Viewing Issues in Photoshop CC

Has anyone seen whacky views such as the squigglies shown below in the new PS CC:

Background - same image of course, yet these clips are from 2 different machines that are pretty much the same build. If anything, the whacky view has a newer more powerful graphics card. Not only are both monitors calibrated and to the same calibration standards, same adobe color settings,\but they are both Dell U2410 monitors.

At first I thought it had something to do with gamut warning, and it still might, but turning it off and on doesn't get rid of the weirdness. Not sure if this is a setting somewhere, be it in PS or on the machines itself, a hardware or software issue/malfunction. Kind of at a loss. Any insite or fixes to this issue would be most welcome. Thanks.